| Business | Phone |
| American Postal Workers Union 185 W John St, Hicksville 11801 | (516) 433-2253 |
| Brotherhood-Locomotive Engrs 99 Railroad Station Plz # 200, Hicksville 11801 | (516) 932-7130 |
| Ibew 2 Somerset Ave, Hicksville 11801 | (516) 681-3865 |
| Ibew 20 Jerusalem Ave, Hicksville 11801 | (516) 433-7810 |
| Ibew 69 Broadway, Hicksville 11801 | (516) 433-7810 |
| Transportation Communications 64 Division Ave, Hicksville 11801 | (516) 681-0715 |